The Make Poverty History march in Edinburgh, Scotland, leading up to the 2005 G8 Summit in Gleneagles. Photograph: Getty/Peter Macdiarmid

Unesco's latest report reveals a $7bn deficit in the aid needed to finance basic education by 2015. Sub-Saharan Africa has made great strides in providing primary schooling – Amref has made it a priority in Katine - but challenges remain